642520607 has 8 divisors (see below), whose sum is σ = 666850800. Its totient is φ = 618335424.

The previous prime is 642520603. The next prime is 642520621. The reversal of 642520607 is 706025246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642520607 - 2² = 642520603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642520603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27182 + ... + 44987.

It is an arithmetic number, because the mean of its divisors is an integer number (83356350).

Almost surely, 2^642520607 is an apocalyptic number.

642520607 is a deficient number, since it is larger than the sum of its proper divisors (24330193).

642520607 is a wasteful number, since it uses less digits than its factorization.

642520607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72505.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 642520607 is about 25347.9901964633. The cubic root of 642520607 is about 862.9037446571.

The spelling of 642520607 in words is "six hundred forty-two million, five hundred twenty thousand, six hundred seven".